Einhorn opens positions in Intrexon, NVR, Tempur Sealy

Intrexon (XON) +4.8% AH after David Einhorn's Greenlight Capital reveals it opened a ~2.1M-share position in the biotech company that went public in August. (13F)

Greenlight also started positions in NVR and Tempur Sealy (TPX), and added large stakes in WPX Energy (WPX) and Spirit AeroSystems (SPR); it closed positions on Oaktree Capital (OAK), State Bank Financial (STBZ) and Capital Bank Financial (CBF), while selling 20% of its shares in Rite Aid (RAD).

Its biggest positions are still in Apple (AAPL), 21.1% of the portfolio; GM, 11.3%; and Marvell Technology (MRVL), 9.4%.